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Simplifying
-4 = -1x2 + 12
Reorder the terms:
-4 = 12 + -1x2
Solving
-4 = 12 + -1x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add 'x2' to each side of the equation.
-4 + x2 = 12 + -1x2 + x2
Combine like terms: -1x2 + x2 = 0
-4 + x2 = 12 + 0
-4 + x2 = 12
Add '4' to each side of the equation.
-4 + 4 + x2 = 12 + 4
Combine like terms: -4 + 4 = 0
0 + x2 = 12 + 4
x2 = 12 + 4
Combine like terms: 12 + 4 = 16
x2 = 16
Simplifying
x2 = 16
Take the square root of each side:
x = {-4, 4}
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